Publish Python WHLs on Pypi

It would be good if PyImath and friends were published to Pypi as WHLs, it would mean a greater number of people could use this library.

Many python users look for libraries by searching pypi, or if want their own program to be usable by using `pip install` - which means all the python library dependencies have to be installable from pypi too.

The issue identifies PyImath and related Python packages as the publishing target; no files, tests, or entry points are named. Start by locating the repository’s Python packaging and release configuration, then verify that wheels and their dependencies can be installed with pip from PyPI.

Written by the indexing model from the issue text.